How about a story where creatures attack people at night? They can even be in the safety of their home when it happens. Something like monsters killing, new reports but no evidence on the mysterious murders, some guy or girl witnesses one and gets out of it alive, they try to find the monsters cause they're stupid and they only bring a baseball bat or something, blah blah, horror scenes, create party>invite player, story.

@ Litt that sounds interesting. Of course it would only work out in an enclosed space. You get the horror requirement of attacking beasts with useless weapons, eh? Baseball bat... hmmm... I'm sure i can find some japanese god which raids homes or somethin...